package com.Atao.service.impl;

import com.Atao.mapper.ArticleMapper;
import com.Atao.pojo.Article;
import com.Atao.pojo.PageBean;
import com.Atao.service.ArticleService;
import com.Atao.service.FileDelete;
import com.Atao.utils.ThreadLocalUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;
import java.util.Map;

@Service
public class ArticleServiceImpl implements ArticleService {

    @Autowired
    private ArticleMapper articleMapper;

    @Autowired
    private FileDelete fileDelete;

    @Override
    public void add(Article article) {
        //补充属性值
        article.setCreateTime(LocalDateTime.now());
        article.setUpdateTime(LocalDateTime.now());
        Map<String,Object> map= ThreadLocalUtil.get();
        Integer userId=(Integer) map.get("id");
        article.setCreateUser(userId);
        articleMapper.add(article);
    }

    @Override
    public PageBean<Article> list(Integer pageNum/*当前页*/, Integer pageSize/*每页的数量*/, Integer categoryId, String state) {
        //1、创建PageBean对象
        PageBean<Article> pb=new PageBean<>();

        //2、开启分页查询,调用PageHelper插件
        PageHelper.startPage(pageNum,pageSize);

        //3、调用mapper
        Map<String,Object> map=ThreadLocalUtil.get();
        Integer userId=(Integer) map.get("id");
        List<Article> as=articleMapper.list(userId,categoryId,state);
        //Page中提供了方法，可以获取PageHelper分页查询后，得到的总记录条数和当前页数据
        Page<Article> p=(Page<Article>) as;
        //把数据填充到PageBean对象中
        pb.setTotal(p.getTotal());
        pb.setItems(p.getResult());
        return pb;
    }

    @Override
    public Article findById(Integer id) {
        Article a=articleMapper.findById(id);
        return a;
    }

    @Override
    public void update(Article article) {
        article.setUpdateTime(LocalDateTime.now());
        String oldUrl = articleMapper.findById(article.getId()).getCoverImg();
        System.out.println("老url为："+oldUrl);
        String newUrl = article.getCoverImg();
        System.out.println("新url为："+newUrl);

        if(!oldUrl.equals(newUrl)&& !oldUrl.isEmpty()){
            String fileName = oldUrl.substring(oldUrl.lastIndexOf("/") + 1);
            fileDelete.deleteFile(fileName);
        }
        articleMapper.update(article);
    }

    @Override
    public void delete(Integer id) {
        String url = articleMapper.findById(id).getCoverImg();
        String fileName = url.substring(url.lastIndexOf("/") + 1);
        fileDelete.deleteFile(fileName);
        articleMapper.delete(id);
    }

    @Override
    public List<Article> allList() {
        return articleMapper.allList();
    }

}
